# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============================================================================
# Copyright 2021 Huawei Technologies Co., Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

''' A collection of general python utilities '''

import time

class Timer(object):
    """
    modified from:
    http://stackoverflow.com/questions/5849800/tic-toc-functions-analog-in-python
    a helper class for timing
    use:
    with Timer('foo_stuff'):
    # do some foo
    # do some stuff
    as an alternative to 
    t = time.time()
    # do stuff
    elapsed = time.time() - t
    """

    def __init__(self, name=None, verbose=True):
        self.name = name
        self.verbose = verbose

    def __enter__(self):
        self.tstart = time.time()

    def __exit__(self, type, value, traceback):
        if self.verbose:
            if self.name:
                print('[%s]' % self.name, end="")
            print('Elapsed: %6.4s' % (time.time() - self.tstart))
